Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 532 · 40 questions

What you do (Air pushes): 1. Fill a plastic glass right to the top with water. 2. Lay the postcard flat on top, covering the rim. 3. Over a sink or bucket, hold the card and turn the glass upside down. 4. Slowly take your hand away from the card and watch.

1. 1.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) yeast (d) a stiff postcard
2. 2.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
4. 4.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a mirror (d) a towel
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
8. 8.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a suction hook (d) a vacuum cleaner
9. 9.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a magnetic chess set (d) a vacuum cleaner
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) how full the glass is (b) whether the card stays (c) the same card (d) the same glass
12. 12.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a drinking straw (d) a compass needle
13. 13.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.True or false: a compass needle works by magnetism. (a) False (b) True
17. 17.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) how full the glass is (c) the same card
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
21. 21.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the same card (c) the way we turn it (d) whether the card stays
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
25. 25.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) the way we turn it (c) whether the card stays
27. 27.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a magnetic pin holder (d) a bicycle pump
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a stiff postcard (d) a towel
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a battery cell (d) a mirror
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
32. 32.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
33. 33.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.True or false: a medicine dropper works by air pressure. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a vacuum cleaner (d) a suction hook
38. 38.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a fridge magnet (d) a compass needle
39. 39.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a vacuum cleaner (d) a bicycle pump

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